StarChile 2010   :   CCD observations of variable star ATACAMA1 Nor


The new W UMa (EW) type eclipsing binary ATACAMA1 Nor = CzeV203 Nor = VSX J155522.5-550950 = USNO-B1.0 0348-0536257 (R.A. = 15h 55m 22.591s, Decl. = -55° 09' 50.84", equinox 2000.0, m = 14.2 - 14.7 R mag) has been found near variable star GM Nor on 04th April 2010 by Martin Lehký and Dalibor Hanžl at Space Atacama Lodge near San Pedro de Atacama, Chile (68° 10' 48.7" W and 22° 57' 09.8" S) using a 0.20-m f/4 reflector and SBIG ST-8 CCD camera with BVRI filters (field of view 59' x 39' and 2.3" x 2.3" / 1 px).

Comparison stars were cmp USNO-B1.0 0344-0509633 ( R.A. = 15h 52m 07.746s, Decl. = -55° 34' 43.30", J2000.0, R2mag = 10.06), ch1 USNO-B1.0 0346-0528206 ( R.A. = 15h 52m 20.364s, Decl. = -55° 21' 08.80", J2000.0, R2mag = 10.31) and ch2 USNO-B1.0 0346-0526878 ( R.A. = 15h 51m 30.645s, Decl. = -55° 23' 56.37", J2000.0, R2mag = 9.73).


ATACAMA1 Nor / 8 nights / 42.1 hours / VR / 9 minima timings (13)

HJD Min I = 2455296.70616 +/- 0.00078   /   P = 0.298603 +/- 0.000037 d   /   amplitude 0.47 mag


Discovery has been preliminary published in the catalogue CzeV (# 203) - 24th July 2010 & in the International Variable Star Index (# VSX J155522.5-550950) - 24th July 2010.
The times of minima will be publish in the database of Variable Star and Exoplanet Section of Czech Astronomical Society.






ATACAMA1_GMNor




20100404-20100418 (time span: 14 days; data points: 555)

ATACAMA1Nor_20100404-20100418_R_LEH_phased_HJD_magcorr_4.416



04. IV. 2010

ATACAMA1Nor_20100404_VR_LEH_lightcurve



07. IV. 2010

ATACAMA1Nor_20100407_VR_LEH_lightcurve



08. IV. 2010

ATACAMA1Nor_20100408_VR_LEH_lightcurve



09. IV. 2010

ATACAMA1Nor_20100409_VR_LEH_lightcurve



10. IV. 2010

ATACAMA1Nor_20100410_VR_LEH_lightcurve



13. IV. 2010

ATACAMA1Nor_20100413_VR_LEH_lightcurve



14. IV. 2010

ATACAMA1Nor_20100414_VR_LEH_lightcurve



18. IV. 2010

ATACAMA1Nor_20100418_VR_LEH_lightcurve





Martin Lehký / makalaki@astro.sci.muni.cz / Hradec Králové / Czech Republic   &   Dalibor Hanžl / Brno / Czech Republic
created 24th July 2010 / update 07th October 2012